74HCT573D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT573D,652 is a D-Type Transparent Latch logic IC manufactured by Nexperia USA Inc., configured as a single-channel 8:8 latch with tri-state output in a 20-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 74HCT573 series maintains functional compatibility across multiple manufacturers while accommodating variations in electrical performance and product status.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Supply Voltage Range	4.5V ~ 5.5V
Independent Circuits	1
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 125°C
Current Output High / Low	6mA / 6mA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 74HCT573D,652 is determined by strict adherence to the following parameters:

Critical Parameters (Must Match):

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 4.5V ~ 5.5V
Package / Case: 20-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount

Allowable Variations:

Propagation Delay Time: 17ns to 35ns
Operating Temperature Range: -40°C to -55°C minimum; 85°C to 125°C maximum
Current Output: 6mA to 7.2mA
Moisture Sensitivity Level (MSL): 1 to 3
Product Status: Active or Obsolete
Manufacturer: Nexperia USA Inc., Texas Instruments, onsemi, Harris Corporation, Fairchild Semiconductor

Substitute parts must maintain functional equivalence within the 74HCT573 base product family and support the same pinout and electrical interface.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Propagation Delay (ns)	Operating Temp (°C)	Current Output (mA)	RoHS Status	MSL
74HCT573D,652	Nexperia USA Inc.	Obsolete	17	-40 ~ 125	6 / 6	ROHS3 Compliant	1
74HCT573D,653	Nexperia USA Inc.	Active	17	-40 ~ 125	6 / 6	ROHS3 Compliant	1
CD74HCT573M	Harris Corporation	Obsolete	35	-55 ~ 125	6 / 6	RoHS Non-Compliant	N/A
CD74HCT573M96	Texas Instruments	Active	35	-55 ~ 125	6 / 6	ROHS3 Compliant	1
MC74HCT573ADWG	onsemi	Active	30	-55 ~ 125	6 / 6	ROHS3 Compliant	3
MC74HCT573ADWR2G	onsemi	Active	30	-55 ~ 125	6 / 6	ROHS3 Compliant	3
MM74HCT573WM	Fairchild Semiconductor	Active	17	-40 ~ 85	7.2 / 7.2	N/A	N/A
MM74HCT573WMX	Fairchild Semiconductor	Active	17	-40 ~ 85	7.2 / 7.2	N/A	N/A
SN74HCT573DW	Texas Instruments	Discontinued at DiGi Electronics	25	-40 ~ 85	6 / 6	ROHS3 Compliant	1
SN74HCT573DWR	Texas Instruments	Active	25	-40 ~ 85	6 / 6	ROHS3 Compliant	1

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: 74HCT573D,653 (Nexperia USA Inc.) is the direct equivalent with identical electrical specifications and active product status. This part maintains the same propagation delay (17ns), operating temperature range (-40°C ~ 125°C), and RoHS3 compliance as the original 74HCT573D,652.

Active Product Alternatives:

SN74HCT573DWR (Texas Instruments): Active status with ROHS3 compliance. Propagation delay of 25ns is acceptable for non-timing-critical applications. Operating temperature limited to -40°C ~ 85°C.
CD74HCT573M96 (Texas Instruments): Active status with ROHS3 compliance and extended temperature range (-55°C ~ 125°C). Propagation delay of 35ns requires verification for timing-sensitive circuits.
MC74HCT573ADWR2G (onsemi): Active status with ROHS3 compliance. Propagation delay of 30ns and extended temperature range (-55°C ~ 125°C). MSL rating of 3 requires moisture control during storage and assembly.

Compliance Considerations: All recommended active substitutes maintain ROHS3 compliance and REACH unaffected status. The original part's RoHS non-compliant alternatives (CD74HCT573M, MM74HCT573WM, MM74HCT573WMX) should be avoided for new designs requiring regulatory compliance.

Temperature Range Constraints: Applications requiring the full -40°C ~ 125°C operating range should prioritize 74HCT573D,653, CD74HCT573M96, or MC74HCT573ADWR2G. Parts limited to -40°C ~ 85°C (SN74HCT573DW, SN74HCT573DWR, MM74HCT573WM, MM74HCT573WMX) are unsuitable for high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HCT573DWR as a direct replacement for 74HCT573D,652? A: SN74HCT573DWR is functionally compatible and maintains the same 20-SOIC package, supply voltage, and tri-state output configuration. However, the propagation delay increases from 17ns to 25ns, and the operating temperature range is limited to -40°C ~ 85°C versus the original -40°C ~ 125°C. Verify timing requirements and maximum operating temperature for your application before substitution.

Q: What is the difference between 74HCT573D,653 and 74HCT573D,652? A: Both parts are functionally identical D-Type Transparent Latch ICs from Nexperia USA Inc. with matching electrical specifications. The primary difference is product status: 74HCT573D,652 is obsolete while 74HCT573D,653 is active. The 74HCT573D,653 is the recommended replacement for procurement continuity.

Q: Are onsemi MC74HCT573ADWG and MC74HCT573ADWR2G interchangeable? A: Both onsemi parts share identical electrical specifications and propagation delay (30ns). The difference is packaging: MC74HCT573ADWG is supplied in Tube packaging while MC74HCT573ADWR2G is supplied in Tape & Reel (TR) format. Selection depends on your assembly process requirements. Both maintain ROHS3 compliance and MSL 3 rating.

Q: Why do some substitutes have different propagation delays? A: Propagation delay variation (17ns to 35ns) reflects manufacturing process differences across vendors and product generations. All values remain within acceptable logic circuit tolerances for the 74HCT573 family. Verify that your circuit timing budget accommodates the substitute part's delay specification.

Q: Can I use MM74HCT573WM or MM74HCT573WMX in new designs? A: These Fairchild Semiconductor parts are functionally compatible but lack RoHS3 compliance documentation. For new designs requiring regulatory compliance (RoHS3, REACH), use active alternatives from Nexperia, Texas Instruments, or onsemi instead.

Q: What does MSL 3 (168 Hours) mean for onsemi parts? A: Moisture Sensitivity Level 3 indicates the component requires controlled storage conditions with maximum floor life of 168 hours after moisture barrier bag opening at 30°C and 60% relative humidity. Implement proper moisture control procedures during storage and assembly to prevent solder joint reliability issues.

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